Falling Blocks

About Falling Blocks

This is Jake Gordon’s open source block stacking game, written as a compact single file canvas project and released under the MIT licence. It is a well known teaching example precisely because the whole thing, rendering, input, collision, scoring and the piece bag, fits in one readable file, and it plays properly rather than approximately.

The essential skill is surface management. A flat stack accepts almost any piece, while a jagged one only accepts the two or three shapes that happen to match its notches. Since the piece order is random, a jagged surface is how runs die: you need one shape, you get four squares in a row, and you are forced to bury a hole. One buried hole is survivable. Three of them start a chain reaction that ends the game two minutes later.

The high scoring pattern most players learn next is the well. Keep nine columns level and leave the tenth empty, build up four rows, then drop a straight piece into the gap to clear all four at once. Multi row clears score far more than the same rows cleared individually, so a player who scores well is not necessarily faster, just more patient. The risk is obvious: while you are stacking four rows deep you are also four rows closer to the ceiling.

A preview of the next piece is shown beside the well, which turns the game from reaction into planning. Use it. Deciding where the current piece goes based on what follows it is the habit that separates a two minute run from a fifteen minute one, and the source being open means you can read exactly how the piece randomiser behaves.